Tokyo to require that new homes be outfitted with solar panels

According to The Asahi Shimbun, Tokyo will oblige homebuilders to outfit their newly built homes and buildings with solar panels starting in April 2025.
A legislative measure to introduce quotas for solar panel installations will be submitted to the metropolitan assembly in December this year, according to a Sept. 9 announcement by the Tokyo metropolitan government.
But it will not come with penalties to enforce the new requirements.

https://www.asahi.com/ajw/articles/14718625